Properties of Scalable Chirped-Pulse Optical Comb in Erbium-Doped Ultrafast All-Fiber Ring Laser

Ilya O Orekhov,Anton O Chernutsky,Stanislav G Sazonkin,Aleksander Y Fedorenko,Valeriy E Karasik,Lev K Denisov,Yan Z Ososkov,Dmitriy A Dvoretskiy

doi:10.3390/fib9060036

Abstract

We report on a scalable chirped-pulse Er-doped all-fiber laser, passively mode-locked by single-wall carbon nitride nanotubes. The average output power is ~15 mW, which corresponds to a peak power of ~77 W, and pulse energy of ~1.9 nJ and was achieved using a single amplification stage. We observed chirped-pulse generation with a duration of ~24.6 ps at a relatively low repetition rate of ~7.9 MHz, with a signal-to-noise ratio of ~69 dB. To characterize the short-term stability of the obtained regime, we have measured the relative intensity noise of the laser, which is <−107 dBc/Hz in the range of 3 Hz–1000 kHz. It should be noted that the standard deviation of root mean square of average power does not exceed a magnitude of 0.9% for 3 h of measurement.

Highlights

IntroductionThere has been an increase in the demand for high-energy and high-power laser systems of ultrashort pulses (USP) in areas such as various scientific applications [1], medical surgery [2,3], and industrial micromechanical processing [4,5]
The average output power is ~15 mW, which corresponds to a peak power of ~77 W and pulse energy of ~1.9 nJ after one amplification stage
A single-mode laser diode operating at the central wavelength of 980 nm with a maximum output power of 330 mW was used as the pump source for the erbium-doped fiber (EDF)

Summary

Introduction

There has been an increase in the demand for high-energy and high-power laser systems of ultrashort pulses (USP) in areas such as various scientific applications [1], medical surgery [2,3], and industrial micromechanical processing [4,5]. The creation of such high-energy systems is a nontrivial task, which is caused by the complex nonlinear dynamics of ultrashort pulses. Dissipative solitons are localized formations of the electromagnetic field, which are balanced by the exchange of energy with the environment in the presence of nonlinearity, dispersion, and/or diffraction [7]; the speed limits imposed by an electron sampler [8]

Methods

Results

Conclusion